Sterilizer.



50 may-be required. Any known form of cool- HEINRICH Tne; :or ILENSAHN, GERMANY.

l il

srnnurznn.

`-subjectof the German Emperor, residing at Lensahn, Holstein, Germany,- have invented' 1 enewland useful Im rovements in or Relat ing ,to Sterilizers, `o a'specili'cation.-

- the pasteurization more expedi which .the fol-lowingl is This Iinventin'relates to an apparatus `for It is the object of the invention to e'ect tiousl and in o a niorefeiicient manner than hereto re.

. The apparatus comprises a conical vessel, anda drum of slmllar form 'w1th1n`sa1d' v esesel, the drum-being rotated while the vessel `y ze" y' ...vdoubleewalledjcontainer `to which allfieating medium lis admitted.A fflVIean'sare` provided Y i' a 'spaceisleftthrough-which the fluid-t0 be .'pasteurized is caused to: pass. The station aryconlcal vessel formsthe inner wall of a i 'falso-for introducing a heating medium into the interior of the revolving drum, and for :2,5

carrying awayl thecondensed Huid, for instance 'water if steam-is usedfor heating.

' According to this invention the heating medium such as steam, is introduced into the space between the stationary conical vessel and itscontainer, and into the interior vof the revoluble drum, by means of pipesfwith apertures which direct the heating medium I Aagainst the outer wall of the stationaryconical vessel andagainst the inner wall of the revolving drum. In this way the walls are very effectively heated, and the iuidto be -pasteurized is caused to be heated `to sub- "stantially, the .same temperaturef'as-that of1 .the heating medium used, which may` be for instancelSOor' 140 centigrade .in the' case ofsteam under pressure.. f

" y being higblyfheatedin the apparatus as described passes outfrom the same Vand into a cham er or'vessel whereinit 1s' broken up 'or distributed in the form of a fine spray.

I The milk, cream or other Huid which has been sprayed and thus completely'broken up, iscollectedand carried away from the chamber or vessel, and ultimately cooled as ing; apparatus may be used for this purpose,

part fof the present inven- Specication of Letters Patent.4 Application led December 9,1913. Serial No. 805,619.

shown in vertical section.

fpacked bearings 6 and 7. The stuffing box G.

`is arranged inside the Vessel 2. This ,drum has a tubular-member 4 at the top and a Patented Apr. 14, 1914. l l

Y' panying drawing, wherein the apparatus is l V The container 1 is preferably-of cylindrical form, and the stationaryjconical vessel Q 2 issupported'therein; the revoluble drum 3 .is arranged inthe cover 8 of the vessel 2,

.this cover being secured by bolts 9 tol a iange 2a of the vessel 2 and to` a iange at -fthe top ofV the" container 1, while packingv is stationaryL.. Between thesetwo members 7 rings are inserted between' said cover and l flanges to make thejoints steamftight. Ther i i ljower stuiiing born-7 'forms the connection i l i between the container 1 and vessel v2 at the bottom i The pipe 11y enters the drum at the through the tubular member 4, and a gland apertures as at 12, which are outwardly di-` .rected. -A` pipe 13 enters the container 1 and is carried in a spiral form around the vessel 2, being formed with holes at 14 .for

10 fitting therein. The pipe is divided intodirecting the heating {iuid against the outer p surface of the wall of the said vessel.

or cream is introduced into the vessel 2 from below through the pipe 15; the Huid being fed by a suitable pump throu h the said piper V'Alfter being pasteurize the fluid The duid to be paSteuriZed, such as milk i `leaves the vessel 2A at the top thereof through y'a pipe lhavino a thermometer 18 therein for .indicating the temperature. The pipe.

1G leads to achamber or vessel 41, and is provided at its end inside the said vessel with one or more spraying nozzles which .may be of any suit-able form; Preferably these nozzles are of the type as shown, each consisting of a pair of pipes 42and 43 whose openings are directed across one another, so that the streams of liquid issuing from the -sameirnpinge one against the other, whereby the liquid is converted into finely divided spray. The removable cover 41 of the vessel 41 is provided with one or more pipes 44 throughwhich the mist and steam produced duringvthe spraying operation can bc drawn ofi. From the bottom of 'the vessel 41, a pipe 45 leads away'to a cooling. apparatus of any suit-able type (not shown).

Steam pipes l1 4and 13, the one being branched from the other, have cocks 19 and 20 therein for controlling the supply of the steam-used for heating purposes. Couplings are provided at 21, 1n order to permit of the removal of the portion of theA pipe 11 between the cock 19 and the gland 10. The pipe member 5 which serves' as a lower axis for the drum 3 is supported in an adjustable bearing constituted by the tubular member -22 in order that it may be raised and lowered so as to vary the height of the drum, and to increase or reduce the space between the conical walls of the vessel 2 and of said drum. When the drum 3 is raised or lowered the number of the packing rings or the like inserted between the ange 2a of the vessel 2 and the cover 8 is also increased or reduced, in order to raise or lower the cover 8 to a corresponding extent. On the lower part of the tubular member 22 is mounted a bevel wheel 23 gearing with a wheel 24 mounted on a'shaft 27 which is carried in supports 25 and 26. The shaft is driven by a belt for instance, working on fast and loose pulleys 28 and 29. A toothed wheel 23 attached to the tubular member 22 turns upon a ball-bearing 30, and the passage through the same extends downwardly into a condensing vessel 31. A pipe 32 leading out from the bottom of the container l, also terminates in the condensing vessel 31.

Close to the end of one of the stationary perforated pipes 11a, 11, is attached an arm 33 carrying a radial pipe 34, at the outer end of which a scoop 35 is formed, while its inner end projects into the pipe 5. The scoop '-35 catches the condensed water which is thrown against the circumference of the drum owing to its rotation, and it conducts this water into the pipe 5, which latter is connected with the pipe member 22 through a longitudinally adjustable and detachable coupling 36. The drum 3 and vessel 2 are of such relative sizes that a narrow spa-ce is left circumferentially between theirl walls, and also between them at the top and bottom, so that only a comparatively small amount of liquid can be passing throu h the vessel 2 at any time. The steam ejected through the holes 12 and 14 of the pipes 11, 11b and 13 strikes against the walls of the drum 3 and vessel 2, and results in the heating to a high temperature of the liquid in contact with these walls. The outer walls of the drum 3 are made smooth so that they cannot become coated with fatty material separated from the cream vpassing therethrough.

By means of the new heating device as above described, the heat' of the steam is very effectively used, while a comparatively small amount of steam is employed. 4Safety valves 37 and 38, and pressure gages 39 liquids, the combination with a stationary vessel and a revoluble drum arranged inside the said vessel so as to leave an intervening space, and means for revolving the drum, of means for conveying a heating fluid to the surfaces of the walls of thevessel and drum, said means comprising a pipe disposed in coils around the vesselfand formed with perforations on t-he side adjacent to said vessel, and a second pipe with means for carrying the same through one endof the revolving drum, said second pipe being disposed adjacent to the inner surface of the wall of the drum, and formed with perforations on the .side adjacent to said wall.

2. In a pasteurizing apparatus, the combination with a container, a conical stationary vessel therein, a conical drum smaller than saidA vessel and fitting within the same so as to leave an intervening space, means for rotating the drum and bearings for supporting the same, of a plurality of perforated hollow members and means for supplying Ya heating medium thereto, said' perforated members being disposed respectively adjacent to the outer surface of said vessel and to the inner surface of said drum, and means for carrying. away the cooled heating medium from within the drum and from the container.

3. In an apparatus for pasteurizing liquids, the combination of a double-walled vessel whose inner wall is conical in form, a conical revoluble drum adapted to fit in said vessel so as to leave a space between said drum and the conical wall of the vessel, and closing means for the top of said vessel, with bearings for supporting the drum at its ends, means for revolving said drum at high speed, means for adjusting the height of said drum in the vessel for the purpose of varying the volume of the space between the circumferential walls of the drum and the conical surface of the vessel, perforated hollow members disposed in the vessel and in the drum respectively adjacent to the conical walls thereof, and means for conveying a heating fluid thereto for the purpose of heating said walls. 4

4. In a pasteur'izing apparatus the combination of a double-walled vessel, a revoluble drum disposed within the same, means for rotating said drum and for supporting the same at its ends,pipes for conveying a heating fluid into the double-walled vessel and into the interior of the drum respectively, said pipes having perforations therein directed toward the conical walls, means for supplying steam to said pipes, and means for removing condensed water comprising a pipe leading away from the double-walled vessel, a pipe leading away.` from the lower end of said drum through its lower bearing, a scoop for conve ing the liquid from the inner surface of t e drum to said latter pipe, and an arm supporting said scoop from a portion ofthe pipe which supplies the steam to the interior of the drum.

5. In a pasteurizing apparatus, the combination of a stationary receptacle, a rotating drum within and spaced from the walls of the stationary receptacle to form a milk passage, means for introducing milk at the bottom of the milk passage, means at the upper end of the milkpassage to carry off t-he pasteurized milk, means for rotating the drum, a plurality of perforated pipes in the drum to introduce steam to heat the walls of the drum, a drain at the bottom of the drum a pipe communicating with the drain and having at its outer end a flared mouth to engage the inner wall of the drum to carry olf the condensed steam, and means including a coil around the stat-ionary receptacle to heat the latter.

In testimony whereof I have signed my name to this specification in the resence of two subscribing witnesses, tl1ia2 th day of November 1913.

HEINRICH TDT.

Witnesses:

FREIDR. Juuus Poms, ERNEST H. L. MUMMENHoFr. 

